nanog mailing list archives
Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?)
From: Robert Raszuk <robert () raszuk net>
Date: Sun, 21 Jun 2020 15:24:30 +0200
It is destination based flat routing distributed 100% before any data packet within each layer - yes. But layers are decoupled so in a sense this is what defines a hierarchy overall. So transport is using MPLS LSPs most often hosts IGP routes are matched with LDP FECs and flooded everywhere in spite of RFC 5283 at least allowing to aggregate IGP. Then say L2VPNs or L3VPNs with their own choice of routing protocols are in turn distributing reachability for the customer sites. Those are service routes linked to transport by BGP next hop(s). Many thx, R. On Sun, Jun 21, 2020 at 1:11 PM Masataka Ohta < mohta () necom830 hpcl titech ac jp> wrote:
Robert Raszuk wrote:MPLS LDP or L3VPNs was NEVER flow driven. Since day one till today it was and still is purely destination based.If information to create labels at or near sources to all the possible destinations is distributed in advance, may be. But it is effectively flat routing, or, in extreme cases, flat host routing. Or, if information to create labels to all the active destinations is supplied on demand, it is flow driven. On day one, Yakov said MPLS had scaled because of nested labels corresponding to routing hierarchy. Masataka Ohta
Current thread:
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?), (continued)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Mark Tinka (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Masataka Ohta (Jun 23)
- BGP flooding Robert Raszuk (Jun 23)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Mark Tinka (Jun 21)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Masataka Ohta (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Mark Tinka (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Randy Bush (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Fletcher Kittredge (Jun 23)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Masataka Ohta (Jun 23)
- RE: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) adamv0025 (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Robert Raszuk (Jun 21)
- RE: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) adamv0025 (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Masataka Ohta (Jun 22)
- RE: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) adamv0025 (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Mark Tinka (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Masataka Ohta (Jun 23)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Mark Tinka (Jun 21)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Robert Raszuk (Jun 20)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Mark Tinka (Jun 21)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Mark Tinka (Jun 21)
- Re: Devil's Advocate - Segment Routing, Why? Masataka Ohta (Jun 19)